Co-creators of the Money Flow Index
Gene Quong & Avrum Soudack
Gene Quong and Avrum Soudack introduced the Money Flow Index in 'Volume-Weighted RSI: Money Flow', in the March 1989 issue of Technical Analysis of Stocks & Commodities. Little else about either author is publicly documented.
What they argue
- Wilder's RSI uses only closing prices and so ignores volume.
- Classic market tops come with rising volume, so a volume-weighted RSI better measures money entering and leaving a market.
Sources
Traders.com: 'Volume-Weighted RSI: Money Flow', S&C V.7:3 (March 1989)StockCharts ChartSchool: Money Flow Index (MFI)
Summaries are Be The Puck's paraphrase of public material. Be The Puck has no affiliation with the people listed.
Money Flow Index 20/80
Rule and full recordVolume & money flow · daily
RSI with volume added. Buy when it climbs out of oversold (20), sell when it drops out of overbought (80).
In right now173 of 377As of the Oct 13, 2026 close.
Best risk-adjusted results against buy and hold: